XML 61 R40.htm IDEA: XBRL DOCUMENT v3.24.0.1
Investments - Geographic Investment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Schedule of Investments [Line Items]    
Cost $ 9,934,159 $ 9,657,872
Fair Value $ 9,868,440 $ 9,617,248
Fair Value as % of Net Assets 199.30% 231.20%
Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
% of Total Investments at Fair Value 100.00% 100.00%
United States    
Schedule of Investments [Line Items]    
Cost $ 9,381,707 $ 8,934,926
Fair Value $ 9,317,684 $ 8,893,051
Fair Value as % of Net Assets 188.20% 213.80%
United States | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
% of Total Investments at Fair Value 94.40% 92.50%
Canada    
Schedule of Investments [Line Items]    
Cost $ 275,579 $ 510,599
Fair Value $ 278,103 $ 520,368
Fair Value as % of Net Assets 5.60% 12.50%
Canada | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
% of Total Investments at Fair Value 2.80% 5.40%
Bermuda/Cayman Islands    
Schedule of Investments [Line Items]    
Cost $ 436  
Fair Value $ 473  
Fair Value as % of Net Assets 0.00%  
Bermuda/Cayman Islands | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
% of Total Investments at Fair Value 0.00%  
Europe    
Schedule of Investments [Line Items]    
Cost $ 276,437 $ 212,347
Fair Value $ 272,180 $ 203,829
Fair Value as % of Net Assets 5.50% 4.90%
Europe | Investment Owned, At Fair Value | Investment Type Concentration Risk    
Schedule of Investments [Line Items]    
% of Total Investments at Fair Value 2.80% 2.10%